<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <h1>修改商品页面</h1>
    <input type="text" v-model="p.id" placeholder="商品id" readonly>
    <input type="text" v-model="p.title" placeholder="商品标题">
    <input type="text" v-model="p.price" placeholder="商品价格">
    <input type="text" v-model="p.num" placeholder="商品库存">
    <input type="button" value="修改" @click="update()">
</div>
<!--引入axios和vue框架-->
<script src="https://cdn.bootcdn.net/ajax/libs/axios/0.21.1/axios.min.js"></script>
<script src="https://cdn.staticfile.org/vue/2.6.14/vue.min.js"></script>
<script>
    let v = new Vue({
        el: "body>div",
        data: {
            p:{
                id:"",title:"",price:"",num:""
            }
        },
        methods: {
            update(){
                //发出修改的异步post请求
                axios.post("/update",v.p).then(function (response) {
                    alert("修改完成!");
                    //显示到列表页面
                    location.href="/list.html";
                })
            }
        },
        created:function () {
            //发请求 通过id查询到商品的详情并显示到页面中
            //location.search 得到地址栏中?以及后面的内容    ?id=5
            //最终请求路径是/selectById?id=5
            axios.get("/selectById"+location.search).then(function (response) {
                //把服务器响应的商品对象赋值给v.p 这样页面会自动显示出商品信息
                v.p = response.data;
            })
        }
    })
</script>
</body>
</html>